ootags: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/ootags - from package: xemacs-common

You may install the required package with command yum install {package}

Error in other languages:
ootags: bevel nie gevind nie
ootags: comandă negăsită
ootags: comando não encontrado
ootags: commande introuvable
ootags: command not found
ootags: käsku ei ole
ootags: không tìm thấy lệnh
ootags: komanda nerasta
ootags: Kommando nicht gefunden.
ootags: kommandot finns inte
ootags: komut yok
ootags: nie znaleziono polecenia
ootags: níor aimsíodh an t-ordú
ootags: no se encontró la orden
ootags: no s'ha trobat l'ordre
ootags: opdracht niet gevonden
ootags: parancs nem található
ootags: perintah tidak ditemukan
ootags: príkaz nenájdený
ootags: příkaz nenalezen
ootags: команда не найдена
ootags: командата не е открита
ootags: 命令找不到
ootags: コマンドが見つかりません